TY - JOUR
T1 - Production of Titanium Powder by Sodiothermic Reduction in CaCl2 Molten Salts
AU - Du, Chao
AU - Wang, Zheng
AU - Hou, Jungang
AU - Jiao, Shuqiang
AU - Zhu, Hongmin
N1 - Funding Information:
This work was supported by the National Science Foundation of China (Nos. 50934001, 21071014, 51102015, and 51004008), the Fundamental Research Funds for the Central Universities (Nos. FRF-AS-11-002A, FRF-TP-12-023A, and FRF-MP-09-006B), Research Fund for the Doctoral Program of Higher Education of China (No. 20090006110005), National High Technology Research and Development Program of China (863 Program, No. 2012AA062302), Program of the Co-Construction with Beijing Municipal Commission of Education of China (Nos. 00012047 and 00012085), and the Program for New Century Excellent Talents in University (NCET-11-0577).
Publisher Copyright:
© 2014, The Minerals, Metals & Materials Society and ASM International.
PY - 2014/10
Y1 - 2014/10
N2 - A new sodiothermic reduction process of TiO2 in CaCl2 melt was proposed aimed at fine Ti powder preparation. The chemical analysis and direct potentiometric methods were used to investigate the reaction pathway of sodiothermic reduction in CaCl2 melt. The as-prepared samples were characterized by X-ray diffraction and scanning electron microscopy. It was found that when reductant of Na was added into the CaCl2 melt, Ca2+ was reduced to Ca by Na and Ca dissolved in the CaCl2 melt. The whole melt would have the reducing power with dissolved Ca. Using this melt as a reaction medium, fine and uniform Ti powder with a purity of around 99 mass pct was successfully produced at 1173 K (900 °C). In addition, as the CaCl2 melt could dissolve about 20 mol pct CaO, it was found that the molar ratio of TiO2 and CaCl2 should be 1:20 to eliminate the by-product CaO from the reaction interface within the experimental period to continue the reduction.
AB - A new sodiothermic reduction process of TiO2 in CaCl2 melt was proposed aimed at fine Ti powder preparation. The chemical analysis and direct potentiometric methods were used to investigate the reaction pathway of sodiothermic reduction in CaCl2 melt. The as-prepared samples were characterized by X-ray diffraction and scanning electron microscopy. It was found that when reductant of Na was added into the CaCl2 melt, Ca2+ was reduced to Ca by Na and Ca dissolved in the CaCl2 melt. The whole melt would have the reducing power with dissolved Ca. Using this melt as a reaction medium, fine and uniform Ti powder with a purity of around 99 mass pct was successfully produced at 1173 K (900 °C). In addition, as the CaCl2 melt could dissolve about 20 mol pct CaO, it was found that the molar ratio of TiO2 and CaCl2 should be 1:20 to eliminate the by-product CaO from the reaction interface within the experimental period to continue the reduction.
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U2 - 10.1007/s11663-014-0083-2
DO - 10.1007/s11663-014-0083-2
M3 - Article
AN - SCOPUS:84919936059
SN - 1073-5615
VL - 45
SP - 1750
EP - 1756
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 5
ER -